Static eliminator



July 30, 1929. A. LATHROP STATIC ELIHINATOR Filed Sept. 1928 l atented July 30, 1929.

UNITED STATES 1,722,963 PATENT OFFICE.

ASA LATER-OP, OF CHARITON, IOVTA, ASSIGNOR OF ONEJ-IALF TO HENRY E. JOHNSON,

BEN O. MEADOWS, WILLIAM J. GRIFFITHS, LOVELL. C. \VIRENE, EUGENE F. MAR- SHALL, HERMAN F. MCCOLLOUGH, SAMUEL WILLIAMS, EARL L. SNYDER, AND FRANK I-I. DOSER, ALL OF CI-IARITON, IOWA.

STATIC ELIMINATOR.

Application filed. September 8, 1928. Serial No. 304,637.

The object of my invention is to provide a simple, inexpensive and eflicient static ellminator for radio receiving sets.

More particularly it is my object to provide such a static eliminator adapted to be interposed in the lead-in wire from the antenna to the set comprising a body of cork having the intake and outlet wires inset therein and formed with U-shaped portions at their ends and arranged with a short gap between the aligned adjacent ends of the interior arms of such U-shaped portions.

Another object is'to provide in such a static eliminator, simple means for varying the width of the gap.

With these and other objects in view my invention consists in the construction, arrangement and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my clalms, and illustrated in the accompanying drawings, in which:

Figure 1 is a perspective view of a static eliminator, embodying my invention.

Figure 2 is a longitudinal sectional view through the same; and

Figure 3 is a diagrammatic View illustrating the installation or" the static eliminator in connection with the radio receiving set.

In the accompanying drawings, I have shown the receiving set 10, the antenna 12 and the lead-in wire 14.

My improved static eliminator indicated generally at A is interposed in the lead-1n wire 14. The lead-in wire is divided to form the section 14 leading from the antenna to the static eliminator A and the section 14 leading from the static eliminator to the set 10.

My improved static eliminator comprises a body of cork 16 into which I inset two wire members 18 and 20. Each wire member 18 and 20 has at its inner end, a U-shaped portion 18 and 20 One arm of each U-shaped portion projects from the cork as indicated at a and b and after the insertion of the wires in the cork, these arms are formed with loops 22 and 24 as clearly shown in Figures 1 and 2. The other arms as indicated at c and (Z are arranged in alignment in such a way as to pro- Vide a short gap 26 between them.

The loops 22 and 24 are connected respectively with the lead-in wire sect-ions 14 and 14 in any suitable Way.

I preferably provide means for adjusting the Wire 18 comprising a post 28 having at one end the hole 30 through which the U-shaped portion 20 is extended and at the other end, the head 32.

The post 28 projects from the end of the cork 16. The shank of the post 28 is provided with a plurality of graduations 34 for convenience in utilizing the post for slidably ad usting the wire 18 for regulating the size of the gap 26.

In the use of my static eliminator, I find that where it is assembled in the manner described herein, static is largely eliminated. There is a slight reduction in volume. By decreasing the size of the gap, volume 1s increased and the elimination of static is decreased. correspondingly, the increase in the size of the gap, decreases the volume and increases the degree of elimination of static. I have found that making the post 28 of steel, has the effect ofincreasing the volume. It will, of course, be understood that the head 82 is of insulating material. It will also be understood that my improved static eliminator may be inclosed in a suitable case of insulating material and if desirable, insulations may be provided to cover the portions 22, 24, a and b of the wires 18 and 20.

Some changes may be made in the construction and arrangement of the parts of my device without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents, which may be reasonably included within their scope.

I claim as my invention:

1. A static eliminator comprising a body of cork, wire sections embedded in said body and having portions projecting therefrom adapted to be interposed in and connected to a lead-in wire of a radio receiving set, the wires in said cork having U-shaped ends, the inner arms of which are aligned with each other to provide a gap between them.

2. A static eliminator comprising a body of cork, wire sections embedded in said body and having portions projecting therefrom adapted to be interposed in and connected to a lead-in wire of a radio receiving set, the wires in said cork having U-shaped ends, the inner arms of which are aligned with each other to provide a gap between them, means for adjusting one of said wires in the cork for varying the size of said. gap,

3. A static eliminator comprising a body of cork, Wire sections embedded in said body and having portions projecting therefrom adapted to be interposed in and connected to a lead-in wire of a radio receiving set, the wires in said cork having U-shaped ends, the inner arms of which are aligned with each other to provide a gap between them, means for adjusting one of said wires in the cork for varying the size of said gap, said means comprising a member connected with one of said U-shaped portions and projecting from the cork and frictionally engagec therewith.

41-. A static eliminator comprising a body of cork, wire sections embedded in said body and having portions projecting therefrom adapted to be interposed in and connected to a lead-in wire of a radio receiving set, the wires in said cork having U-shaped ends, the inner arms of which are aligned with each other to provide a gap between them, means for adjusting one of said wires in the cork for varying the size of said gap, said means comprising member connected with one of said U-shaped portlons and pro ecting from the cork and fr ctionally engaged therei 1th,

said last named member being provided with graduations.

Des Moines, Iowa, July 13, 1928.

' ASA. LATHROP. 

